CVEvulnerability

CVE-2019-12529

5.9 MEDIUM Published 2019-07-11 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-07-11
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
Weaknesses
CWE-125

Description

An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.

Affected configurations

• squid-cache squid (>= 2.0 < 2.7) • squid-cache squid (>= 3.0 <= 3.5.28) • squid-cache squid (>= 4.0 <= 4.7) • squid-cache squid 2.7 • debian debian linux 8.0 • debian debian linux 9.0 • debian debian linux 10.0 • fedoraproject fedora 29 • opensuse leap 15.0 • opensuse leap 15.1 • canonical ubuntu linux 12.04 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 19.04

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References